Printing telegraph



PRINTING TELEGRAPH Filed- Nov. 12, 1928 ssneets-sheet 1 INVENTOR By/KH/ Omworo A ATTORNEY-5' April 21, 1931. QKAMQTO 1,801,529

PRINT ING TELEGRAPH Filed Nov. 12, 1928 5 Sheets-Sheet 2 a aiK aa aW ATTORNEYJ April 21, 1931.

Y. OKAMOTO PRINTING TELEGRAPH Filed Nov. 12, 1928 5 Sheets-Sheet 3 INVENTOR fw CH/ 0/r4/v0 TO ATTORN EYJ' April 21, 1931. Y. OKAMOTO. 1,

PRINTING TELEGRAPH Filed Nov. 12, 1928 5 Sheets-Sheet 4 j fig; a m

v INVENTOR BY rwm/ O/f/IMOTO flan,

ATTORNEY;

April 21, 1931. Y. OK AMOTO Q 1,801,529

' PRINTING TELEGRAPH Filed Nov. 12. 1928 5 Sheets-Sheet 5 'INVENTOR Vl/ICH/ 0/04/4070 ATTORNEYJ' causes Patented Apr. 21, 1931 UNITED sr r-ss PATENT oFncE rurcnroxnno ro, or EBARA-GUN, 'roxYo, JAPAN rnntrme rnnnsnarn I nue 166mm: 12, 1928. Serial no. 318,731.

' My invention relates to printing telegraphs in which the depression of'zkeyllevers at the "i transmission end bearing an: the characters used in the alphabet, causes byelectrical and 2 5 mechanical means-the depression at the rekey lever transmits a certain combination and order of positive and negative electric impulses of high and low intensity, and each particular combination of such impulses the depression of the corresponding type lever on theireceiving end.

1 In the present preferred embodiment of I myinvention, the depression-of each transmitting key levercauses the closing and open- I 25 ing of a certain combination of -circuit closers and, after such operation, the single revolutionIof a commutator havingbrush contacts corresp'ondingto and in-circuit .with the respective circuit closers, and sourcesof high 30. potential and low potential currents are con- Y nected in circuit with the circuit closers and commutator contacts, so that-each key lever transmits a certain combination and order of 1 positive and negative impulses of high and low intensity.- v 1 g All" the impulses positive and negative, high and low, are transmitted-to and act on a low pressure polarizedrelay in the receiving mechanism, which relay, by means such as an escapement and starting and stopping mechanism caus'es'the of a longitudinally movable cam or tripper shaft in unison with the rotation of the commutator. q j V The high pressure positive and negative impulses alone are transmitted to and act on a high pressure solenoid, which shifts the cam or tripper shaft lengthwise and. engages cams or trippers on said shaft,- corresponding to 5 thebrush contacts on the commutator, with intermittent rotation,

selector bar-operating mechanism in a combinationand order corresponding to the key lever depressed. Notches of the type lever selector bars corresponding to the ,key lever depressed are thereby positioned into alignment and the corresponding type lever is then caused to be depressed and to print, preferably by a type lever operating cam rotating I in unison with the cam or tripper shaft.

In order that my invention may be fully understood, I shall first describe indetail the mode 1n which I at present prefer to carry 7 this invention into practice.

Reference is to be had to the accompanying plication drawings forming part of this a for patent, in which like parts are esignat'ed by the same numbers in all the figures.

Figure 1 is a diagrammatic perspective yiew of a printing telegraph embodying my invention.

Figure 2 is a front elevation of the specific means therein used for starting the commutator by any key lever and for stopping it after each revolution. 7

Figure is a sectional front elevation of the selective means used .for opening and closing a. certain combination of circuit i closers by each key lever before each revolut1on of the transmitting commutator.

Figure 4 is a side elevation of the same.

Figure 5 is a detail view of the receiving type lever operatingmechanism.

' Figure 6 is a detail side new of the escapement, starting and stop mechanisms for the Y receiving tripper shafti.

7 Figure 7 is a side vlew of the same in another position.

Figure 8 1s a plan view of .the same.

Figure 9 is a view, partly diagrammatic, showing the operating of the receiving mech- I amsm. a

Referring first to Figures 1, 2, 3, and 4; 10 designates one of the character or key levers in number corresponding to the charv acters to be transmitted. v r In this example of my invention, sixtytwo key levers are supposed to be used, bearing the characters of the Japanese alphabet, and sixty-two corresponding difierent combinations of positive and negative impulses gage the 7 arms of movable or source of high intensity connected by the wiring 15 to alternate ones of the circuit closers l2, and 16 the high negative electric source, connected by the wiring 17 to the alternate intervening circuit closers 12.

18 indicates the positive electric source of low intensity connected by the wiring 19 to alternate ones of the circuit closers 13, and 20 the low negative electric source connected by wiring 21 to the intervening circuit closers 13. 22 indicates the ground.

To operate the circuit closers 12 and 13 by theselector'bars 11, in this example, the selector bars have bearing notches 23, to enarms 24 of corresponding levers 25 pivoted on a. fixed shaft 26, other arms 27 of which carry insulated bearings 28, to engage and move double contacts 29.

e, in this example, six movable double contacts 29 play between opposing pairs of the high and low tension fixed'cont-acts 30 and 31 respectively, which with the respective movable double contacts 29 form the twelve circuit closers 12 and 13 referred to.

With this arrangement, when any key lever 10 is depressed, it shifts some of the six selector bars 11 in the opposite direction, or all in one or the other direction. I The selector bars 11 tion close the hightension circuit closers and the selector bars 11 moving in the opposite.

direction close the low tension circuit closers.

The six respective double contacts 29 are respectively connected by wires 32, withthe corresponding segmental contacts 33 of a commutator 34, the rotating brush '35 of which is connected by a wire 36 with thehigh pressure operating solenoid 37 and the low pressure polarized relay 38 of the receiving mechanism hereinafter described. v V

With this arrangement it will be seen that at each revolution of the commutator 34,01 specifically the commutator brush 35, a certain com ination of high and low im ulses of high or low intensity, corresponding to the particular key lever depressed and the combination of circuit closers operated thereby will be transmitted to'the solenoid 37 and larized -nism. I To cause a single revolution of the comhigh intensity,

- and depressed the corresponding spring one direction and others in' moving in one direc fment w eel 60 on a relay 38- of the receiving mechabar 40 whose end engages and swings a piv- 41,- on which is p1v- I otal spring-pressed lever oted a lever 42, connected thereto by a spring 43. The lever 42 has a cam 43', to be enga ed by a fixed tripper 44, an a latch 45, ,to engage a lug 46 on a springpressed releasing and stopping lever 47. The lever 47 engages a stop shoulder 48 on a releasing and stopping cam 49 fixed on the shaft 50 of the commutator brush 35.

The commutator shaft is rotated, as shown in Figure 4, by an electric motor (not shown) and intervening slip-clutch 51.

By this means, pressed, the levers 41 and 42 are moved laterally, and the lever'47 disengaged,-through the pull latch 45, from the cam 40, causing the commutator to be rotated by itsmotor.

As the releasing lever 42 is drawn lateral ly, its cam 43 is momentarily depressed by the tripper 44, disen aging the latch 45from the lever 47, which then springs back to engage and stop the cam 49 and thus the commutator on the completion of its single revolution.

To hold the circuit closers 12 and'13 in position during the tator, in this example, a spring pressed 1e ver 52, as shown in Figure 3, is pivoted to a when any key leveris' de- I revolution of the commu a gage the upper endsvof arms 56 of all of the 7 six circuit .closing levers 25, in either position into which they are swung by the selector bars 11. The free end of the detent lever '52 is engaged as a follower by a cam 57 fixed on the commutator shaft 50, so that after the circuit closers 12 and 13 are properly positioned by the key lever.10, the cam 57 will release the detent lever 52 and permit it to lock all the circuit closing levers 25 in position during the rotation of the commutator, and after the revolution of the commutator is completed,

the cam 57'will free the detent lever from the circuit closing levers and permit them and the circuitclosers to reassume their normal position. p Y To depress the corresponding receivingtype levers 58 when the key levers 10 are depressed, in this example of my invention, I use the mechanism shown in Figures 5 to 9.

,5 All the impulses, positive and negative, high and low, operate the polarized're ay 38, but only the'positiveand negative impulses of high intensity affect the solenoid 37." h

The polarized relay 38. vibrates laterally an esca ement. lever 59,engaging an'escapemultiple cam or'tripper shaft 61, driven by a motor'65 (Figure 9) so that the shaft 61 is rotated in unison with the transmitting commutator shaft, andth tripper shaft 61 carriesa number, inthis case six, cams or trippers 62 corresponding to the respective transmitting commutator contacts,

3 means being provided as hereinafter jde- 1scribed, so that a combination andorder of tripper-s 62 corresponding to the key lever- .de.-- pressed and the combination and order of varying impulsestransmitted'will be thrown into coaction with selector-bar operating means to shift and position a corresponding combination of type lever selectoribars v63j and-cause the depression of thetype lever58 corresponding to the key leveri depressed.

Inorder'to correct or compensate forajny unusual difierencein speed of the motorsiof the sending and receiving machines, orfin The engaging part of this escapenient lever I 59 is pivoted to swingoutward from' theescapement wheel to provide a disengaging movement independent ofthedisengaging I movement of the pawl or lever provided by its' lateral movement. V a

The pawl is held in eugagementwith the wheel by a spring 66 better shown-in Figure 1. 9 This pivoted spring'drawn part of the lever or pawl '59 is forced 'awayfrom its contact with the escapement wheel by one arm-pfa pivoted lever 67-. The other arm ofthis pivoted lever, which is formed with acam end, is engaged in a certain one of its positions by an actuating lever 68,: This lever 68 is also spring-drawn away from the lever 67, and is further spring-drawn toward a; worm 69 mounted on the shaft 70, so that a cam-follower, best shown Figure 8, is

drawn into the grpove'ofltlie worm, which worm, it will be understood, is being const'antly driven by. the motor actuated shaft 7 O, which is in turn connected to the shaft 61 5 through a slip clutch 71.

i The cam 72 on he shaft 61 engages'a cam follower 7 3 mounted on a shaft '74: suitably mounted in the frame of the machine, and the oppositend of the shaft 7 4 is provided with an arm 75 which, when the shaft is rocked by the cam 72, engages the lever 68 and throws the cam groove follower on the lever out of the cam groove of the worm, and allows the lever to snap back into its retracted position out of engagement with the lever 67." I i The relative positions of the lever 67 and 68 are such that the lever 68 only engages the lever 67 at the end of its movement to the left, because of its connection to the worm 69. e V

The result of this construction is, that i should the escapement wheel through any disarrangement of the parts or mistiming of the driving motors, be arrested in some poi escapeme'nt wheel at the exact period when 'it will -arrest its 'escapement in the home tion other than its home position, then the continued movement of the shaft will forcer the lever 68 into engagement with the lever 67, and will move the pawl back and allow the wheels 60 to. move a notch 'further into the proper home position, when the cam 72 will disengage the" lever'68 from the worm 69 and allow the pawl 59 to fall into engagement with the position fromwhich it must'start in order to correct thecinaccuracy that may have oc- V curred, and permit the escapement to start onra subsequent operatlon in exact synchroi= nism with the step-by-step impulses comlng from the sending machine.

It'will, of course, be understood that after 7 the esca'pement wheel 60 is arrested, the shaft 61 is also arrested and the shaft 70 con- *tinues its movement independently of the shaft 61 because of the slip clutch 71, and 1 effects the printing of the type bars which have been'brought into operative position. The timing of the parts is such that as the 'shaft61 completes its revolution, the :eam"

100 releases the clutch 94, and this clutch, coming automatically into connection with the shaft 70 makes onecomplete revolution and then becomes locked again by the a pawl 97.

'To shift and position the six type lever selector bars 63, in correspondence with the combination of impulses transmitted by the type lever during the single revolution of the'commutator and tripper shaft 61, in this example, I mount on a part of the shaft 61 rotating with, but separated by a spring 76 1 from the escapemcnt part of said shaft, the

six cams or trippers 62 in proper position, 1 5 7 to. engage at the proper time six corresponding followers 77 on corresponding spring pressed pivoted levers 78,- and thetrippercarrying part of the shaft 61 is shifted into either of two positions by the high pressure V, I

solenoid 37, according to whether the positive and negative impulses are of high or low intensity. 7

The six follower levers- 78 normally engage corresponding levers 79, as shown 111 11 Figure 1, which engage and are connected by springs 80, to levers 81," which in. turnengage and are connected by springs 82 to the corresponding selector bars 63.

By this means when the tripper shaft 61 i V such impulses engage the followers 77, re-

leasingthe follower levers 78 from the levers 79, but do not engage the lever projections 83, so that the levers 79 are pressed by their springs to the right (in Figure 1) and the corresponding selector bars, through the intermediate levers 8l,-to the left.

The type-lever selector bars 63, will thus be positioned according to the combination and order of positive and negative high pressure impulses transmitted.

To depress each type lever 58 corresponding to the key lever depressed, combination of high and low pressure impulses transmitted and selector bars aligned as described, in this example of my invention, I use the means best shown in Figures 5 and 9, comprising levers 83 connected by pin and slot connections to the type levers 58 and spring-pressed pull levers 64 pivotally connected to the levers 83. The pull levers 64 have shoulders 85 which are'engaged by the transverse latch bar 86 of a spring-pressed lever 87, when the end of any pull lever 64 enters the aligned notches of the selector bars 63, as shown in Figure 5, and cam shoulders 88 to be engaged by a transverse cam bar 89 on the lever 87. The lever 87 has an arm 90 to be engaged by a follower lever 91, the follower 92 of which is engaged by a cam 93 fixed ona springpressed clutch section 94, engaging a fixed clutch section 95 on the shaft 7 0. The movable clutch section 94 is fixed to a throw off cam 96, which engages a follower arm 97, of a rock shaft 98, which hasanother follower .arm 99 engaging a cam 100 fixed on the escapement shaft 61.

The construction and arrangement is such that when the selector bars 63 are positioned as described, the cam 100 will, through the rock shaft 98 and follower arms 99 and 97, cause the movable clutch section .94 to engage ,the clutch section 95', the cam'93 to operate the levers 91 and 87, and the latch bar 86 to actuate the selected pull lever 64, and depress the selected type lever 58. The lug 89, of the lever 87, then reversely engages the 'cam 88, and releases the selected pull lever 64, from the selector bar notches.

Itis evident that many other specific means vthan those herein described maybe used to carry out my invention without'departing from the boundaries thereof as defined by the following claims. i

I claim, as my invention i 1. A printing telegraph comprising 0. sending unit having seleetorke s, and means for transmit-ting different com inations and orders of electrical impulses of high and low po= tential controlled y the keys, a line connected receiving unit having printing types corres onding to the sending keys, :1 line controlle printer, and'operating means for caus- 2. A printing telegraph comprising a sending unit having selector keys, and means for transmitting different combinations and orpotential, and positive and negative characteristics controlled by the keys, a line con- ,nected receiving unit having printing types corresponding to the sending keys, a hne con trolled printer and operating means for causing each combination and order of line im' pulses of high and low potential and positive and negative character to be synchronously and simultaneously effective in the'receiving unitindependently of local conditions in said unit. 1

3. A printing telegraph comprising transmitting key levers, circuit controllers, means for closing and opening a different combination of circuit controllers by each key lever, a commutator having brush contacts'corresponding to and in circuitwith the respective circuit controllers, means for controlling the revolution of the commutator by each-key lover, a driving motor, a transmittingcircuit connected to the commutator brush, electric sources of high and low intensity connected to the circuit controllers so that a certain combination and order of electric impulses of high and-low intensity will be transmitted by each revolution of the commutator, recep'- tion type levers corres onding to the respective key levers, and

whereby each combination and order of high and low impulses controls a synchronizing operation of the type lever corresponding to ders of electrical impulses of high and low ion ne controlled means,

erating the printing lever.

4. A printing telegraph comprising transmitting key levers, circuit controllers, means for closing and opening a different combinationof circuit controllers by each key lever, a commutator having brush contacts corresponding to and in circuit with the respective circuit controllers, means for causing the revolution of the commutator controlled vby each key lever, a driving motor, a transmitting circuit connecteu to the commutator brush, positive and negative electric sources of-high and low intensity connected to the circuit controllers so that a certain combination and order of positive and negatiye electric impulses of high and low intensity will be transmitted by each key lever, reception levers corresponding to the respective ey levers, and line controlled means whereby each combination and order of positive and negative high and low impulses controls a synchronized operation of the type lever corlever depressed and a motor for operating t A printing telegraph comprising trans mitting key levers, circuit controllers, means forlmlocking, closing and opening and lock ing a difierent combination of circuit control- 5 lers by each key lever, a revolving commutator having brush contacts corresponding to and in circuit with the respective circuit controllers, means for controlling the revolution of the commutator by each key lever, a transmitting circuit connected to the commutator brush, electric sources of high and low intensity connected to the circuit controllers so that a certain combination of electric impulses of high and low intensity will be transmitted by each key lever, reception type levers'corresponding to the respective key levers, an line controlled means whereby each combination and order of high and low impulses transmitted controls the operation of the type lever corresponding to the keyfleverdepressed.

6. A printing telegraph comprisinglcontrolling key levers, a transmission circuit,

means for transmitting a different combination and order of electric impulses of high and low intensity for each key lever, reception type levers corresponding to the respective key levers, type lever'selecting and operating mechanism, a reception relay in the transmission circuit operable only by the high pressure electric impulses, means whereby the high pressure relay controls the operation -of the type lever selecting mechanism, another reception relay in the trans, mission circuit operable by the high and low pressure impulses, and means whereby the high and low pressure relay controls the synchronous operation of the type lever opera-ting mechanism.

7. A printing telegraph in accord with claim 3, in which the means for controlling the rotation of the commutator by each key lever comprises a cam-toothed bar to be shifted by the depression of each key lever, a stop-shouldered cam fixed to revolve with the commutator, a stopping and releasing lever to engage the cam, a lever engagedby the cam-toothed bar, a latch lever connecte to the last named lever to free the stopping and releasing lever from the revolving cam, and a tripper to free the latch lever from the stopping and releasing lever and cause the latter to re-engage the cam.

8. A printing telegraph in accord with claim 3, in which the means-for closing, and

opening a certain combination of circuit controllers by each key lever comprises camtoothed selector bars corresponding to the respective circuit controllers to be engaged and shifted by the key levers, and levers en gaged by the respective selector bars having hearings to engage and operate certain of the able contacts of the respective circuit cording to the key lever de contro pressed.

gaged and shifted by the keylevers, levers engaged by the respective selector bars having bearings 'to engage and operate certain of the movable contacts of the respective circuit controllers according to the key lever depressed, a cam revolving with the commutator, and a cam follower carrying a catch bar'to engage. and lock the levers engaged by the selector bars. 7

10. A printing telegraph in accord with (1 claim 6, in which the type lever selecting mechanism comprises movable selector bars having notches corresponding to the respective type levers, pull levers connected to the respective type levers to enter the aligned notches of the selector bars, a selector shaft, means controlled by the high and low pressure line relay for revolving the selector shaft in exact uni-son with the commutator, a selece tor sleeve sliding on but turning with the selector shaft and having trippers corresponding to the respective selector bars, means controlled by the high pressure relay for shifting the selector sleeve on the selector shaft, tripping levers to engage the respective trippers and operating connections between the tripping levers and the respective selector bars whereby each combination and order of high and low pressure line impulses transmitted will cause a corresponding combination and order of trippers to shift a corresponding coinbination of selector bars so that their notches will be aligned to cause the operation of the type lever corresponding to the key lever depressed.

11. A printing telegraph in accord with claim 6, in which the type lever selecting mechanism comprises movable selectorbars having notches corresponding to the respective type levers, pull levers connected to the respective type levers to enter the aligned notches of -the selector bars, a selector shaft,

d means controlled by the high and low pressure relay for revolving the selector shaft in unison with the commutator, a selector sleeve sliding on but turning with the selector shaft and having trippers corresponding to the respective selector bars, means controlled-by the high pressure relay for shifting the selector sleeve on the selector shaft, levers engaging the respective trippers, other levers engagedby the last named levers and also by the trippers, and operating connections between the last named levers and the respective selector bars, whereby each combination and order of high and low pressure line impulses transmitted will cause a corresponding combination and order of trippers to shift a corre sponding combination of selector bars so that their notches will be aligned to cause. the

operation of the type lever corresponding to the key lever depressed.

12. A printing telegraph in accord with I claim 6, in which the type lever operating mechanism comprises pull levers connected to the respective type levers, selector bars having notches corresponding to the respective type levers, means for aligning the notches of the selector bars in accord with each combination of high and low pressure impulses transmitted to receive the pull bar corresponding to the key lever depressed, a latch bar to engage and operate the type lever pull bar received in the aligned notches, a reception shaft, an escapement mechanism controlled by the high and low pressureline relay whereby each combination of high and low pressure line impulses causes a rotation of the shaft, a cam onthe shaft, and means whereby the cam, operates the latch bar at each revolution of the shaft to operate the type lever corresponding to the key lever depressed.

-13. In a rintingtelegraph. in accord with claim 2, ind

resting it at a normal home position, should it bejnadvertently arrested at an incorrect position so that'the subsequent operation will start from the proper home position.

14. In a printing telegraph in accord with claim 2, automatic means for correcting the receiving mechanism tocause it to start with ieiachoperation from the proper home posiclaim 2, including an escapement in the receiving machine, of automatic means connected to the receiving machine for bringing the escapement to its home position at each operation.

In testimony whereof I afiix my signature. I t YUICHI OKAMOTO.

ependent motors for the sending, and receiving units, and automatic correc-" v tive mechanism in the receiving unit for ar- 15. A printing telegraph in accord with 

